JP5701346B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine including a rotor and a stator.

  2. Description of the Related Art Conventionally, a rotating electrical machine for a vehicle in which a rectifier module is attached to a rear frame of the rotating electrical machine with screws in order to facilitate replacement of the rectifier module (power converter) is known. In such a conventional rotating electrical machine for a vehicle, the GND terminal (−potential) of the rectifier module is connected to the rear frame with a screw, and the stator terminal (+ potential) of the rectifier module is the stator winding of the stator of the rotating electrical machine. It connects with the lead-out | draw-out wire pulled out from the screw (for example, refer patent document 1).

JP 2011-188560 A

  However, in the conventional vehicular rotating electric machine as described above, most of the cooling of the heat generated by the rectifier module depends on the heat radiation from the GND terminal, but the rear frame is affected by the heat received from the stator or the like. Since the fixed terminal of the rectifier module is connected to this, there is a problem that sufficient cooling cannot be obtained.

  In order to improve the cooling performance, the heat sink (cooling member) is electrically connected to the rear frame, the GND terminal of the rectifier module is connected to the heat sink, and the rectifier module is disposed on the opposite surface of the heat sink to the rear frame side. A method of dissipating heat from the rectifier module with a heat sink is also conceivable. However, the space on the side of the heat sink where the rectifier module is installed has little space for the heat sink fins. There is a need to. When the space between the rear frame and the heat sink is enlarged, the length of the lead wire connected to the stator terminal of the rectifier module is increased, and there is a concern of disconnection due to vibration or the like.

  The present invention has been made to solve the above-described problems, and while making it easy to replace the rectifier module, it is possible to make it difficult to disconnect the lead wire and to improve the cooling performance of the rectifier module. It aims at obtaining the rotary electric machine which can aim at improvement.

  A rotating electrical machine according to the present invention includes a rotor that is rotated about an axis, an annular stator that is disposed coaxially with the rotor and has a stator winding, and a front bracket and a rear bracket. A rotating electrical machine main body having a housing for supporting a child, a rectifier module including a plurality of switching elements, and a heat sink to which the rectifier module is attached, and the heat sink is provided to face the rear bracket in the axial direction. An inverter unit is provided, and the heat sink has a heat sink body to which the rectifier module is attached and a heat radiation fin protruding from the heat sink body to the rear bracket side, and is attached to the rear bracket between the rear bracket and the heat sink body. Support insulation part and the middle provided in the support insulation part Relay member is provided with a terminal, and the rectifier module lead line drawn from the stator winding are electrically connected via the relay terminal.

  According to the rotating electrical machine of the present invention, the relay body is provided between the heat sink body of the inverter unit and the rear bracket, and the lead wire and the rectifier module drawn from the stator winding are connected via the relay terminal of the relay body. Since it is electrically connected, it is possible to prevent disconnection of the lead wire and improve the cooling performance of the rectifier module while ensuring the ease of replacement of the rectifier module.

It is sectional drawing which shows the rotary electric machine by Embodiment 1 of this invention. FIG. 2 is an exploded cross-sectional view of the rotating electrical machine showing a state where the inverter unit is removed from the rotating electrical machine main body of FIG. 1. It is a front view which shows the inverter unit of FIG. It is a front view which shows a state when the rear bracket with which the connecting board of FIG. 1 was attached was seen from the inverter unit side. It is sectional drawing along the VV line of FIG. It is sectional drawing along the VI-VI line of FIG. It is sectional drawing along the VII-VII line of FIG. It is sectional drawing which shows the assembly method of the stator and rear bracket of FIG. It is a front view which shows a state when the rear bracket with which the connecting board of the rotary electric machine by Embodiment 2 of this invention was attached was seen from the inverter unit side. FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. It is a front view which shows a state when the rear bracket with which the connecting board of the rotary electric machine by Embodiment 3 of this invention was attached was seen from the inverter unit side. It is a front view which shows the inverter unit of FIG. FIG. 13 is a front view showing a state where the inverter unit of FIG. 12 is attached to the rear bracket of FIG. 11. It is sectional drawing along the XIV-XIV line | wire of FIG. It is a front view which shows a state when the rear bracket with which the connecting board of the rotary electric machine by Embodiment 4 of this invention was attached was seen from the inverter unit side. It is a front view which shows a state when the rear bracket with which the connecting board of the rotary electric machine by Embodiment 4 of this invention was attached was seen from the inverter unit side. It is a front view which shows a state when the rear bracket with which the connecting board of the rotary electric machine by Embodiment 4 of this invention was attached was seen from the inverter unit side. It is a front view which shows a state when the rear bracket with which the connecting board of the rotary electric machine by this Embodiment 5 was attached was seen from the inverter unit side.

Embodiment 1 FIG.
1 is a cross-sectional view showing a rotary electric machine according to Embodiment 1 of the present invention. 2 is an exploded cross-sectional view of the rotating electrical machine showing a state where the inverter unit is removed from the rotating electrical machine main body of FIG.

  In the figure, the rotating electrical machine 1 includes a rotating electrical machine body 10 and an inverter unit 40 attached to the rotating electrical machine body 10.

  The rotating electrical machine body 10 includes a rotor (rotor) 11 that is rotated about an axis, and a stator (stator) that is a cylindrical armature that is disposed radially outside the rotor 11 and surrounds the outer periphery of the rotor 11. ) 12, a housing 13 that supports the rotor 11 and the stator 12, and a brush device 14 that supplies power to the rotor 11.

  The rotor 11 includes a rotating shaft 15 disposed on the axis of the rotor 11, and a rotor body 16 provided on the rotating shaft 15 and accommodated in the housing 13. The rotor body 16 includes a field coil 17 that generates a magnetic field by power supply from the brush device 14, and a rotor core 18 that is provided with a field coil 17 and that forms a magnetic pole by magnetic flux generated by the field coil 17. have. Cooling fans 19 for generating cooling air are provided at both axial ends of the rotor body 16.

  The stator 12 is fixed in the housing 13 while being arranged coaxially with the rotor 11. The stator 12 includes a cylindrical (annular) stator core 20 surrounding the rotor body 16, and a plurality of stator coils (stator windings) 21 provided on the stator core 20 and arranged in the circumferential direction of the stator core 20. have. When the rotary electric machine 1 is driven, a rotating magnetic field is generated in the stator 12 by power feeding to each stator coil 21, and an AC electromotive force is generated in each stator coil 21 due to a change in magnetic flux accompanying the rotation of the rotor 11 during power generation of the rotary electric machine 1. .

  The stator core 20 is made of a magnetic material (for example, iron or the like). A lead wire 21 a that is electrically connected to the inverter unit 40 is led out from the stator coil 21. In this example, the stator coil 21 is a three-phase winding composed of three phases of U phase, V phase, and W phase. Thereby, in this example, a total of six lead wires 21 a are provided in the stator 12.

  The housing 13 includes a front bracket 22 and a rear bracket 23 that face each other with the rotor body 16 and the stator 12 in the axial direction. The front bracket 22 and the rear bracket 23 are fixed to each other by a plurality of bolts. The six lead wires 21a reach the outside of the housing 13 through a plurality of openings provided in the rear bracket 23, respectively.

  The rotating shaft 15 passes through each of the front bracket 22 and the rear bracket 23. The rotary shaft 15 is rotatably supported by the front bracket 22 and the rear bracket 23 via bearings 24. A pulley 25 around which a transmission belt (not shown) connected to the internal combustion engine is wound is fixed to an end portion of the rotary shaft 15 protruding from the front bracket 22 to the outside of the housing 13. The pulley 25 and the internal combustion engine exchange torque in both directions.

  As shown in FIG. 1, the brush device 14 includes a pair of slip rings 26 fixed to the end of the rotating shaft 15 protruding from the rear bracket 23 to the outside of the housing 13, and each slip while being held by a brush holder 27. A pair of brushes 28 that individually contact the ring 26 are provided. The slip ring 26 is electrically connected to the field coil 17. Electric power is supplied to the field coil 17 from the brush 28 through the slip ring 26. When the rotating shaft 15 is rotating, each slip ring 26 slides on each brush 28.

  A magnetic pole position detection sensor 29 that detects the magnetic pole position of the rotor 11 is provided between the bearing 24 that supports the rear bracket 23 and the brush device 14. The magnetic pole position detection sensor 29 includes an annular sensor stator 29 a and a sensor rotor 29 b that is attached to the rotary shaft 15 and rotated integrally with the rotary shaft 15. The magnetic pole position detection sensor 29 detects the magnetic pole position of the rotor 11 by rotating the sensor rotor 29b with respect to the sensor stator 29a. In this example, the sensor rotor 29b is only an iron core.

  As shown in FIG. 1, the inverter unit 40 is disposed at a position away from the rear bracket 23 in the axial direction when viewed from the front bracket 22. The rear bracket 23 is provided with a plurality of (four in this example) bosses 30 protruding in the axial direction from the rear bracket 23 toward the inverter unit 40. The inverter unit 40 is fixed to the rear bracket 23 via a space by being attached to each boss 30 with a screw. In the central portion of the inverter unit 40, an opening in which the brush device 14 is disposed is provided. The inverter unit 40 is provided with a protective cover 50 that covers the inverter unit 40 from the side opposite to the rear bracket 23.

  FIG. 3 is a front view showing the inverter unit 40 of FIG. As shown in FIGS. 1 to 3, the inverter unit 40 includes a metal cooling heat sink (cooling member) 41, a field module 42 attached to each of the heat sinks 41, and a plurality (six in this example). Rectifier module 43, a control board 44 for controlling each of the field module 42 and each rectifier module 43, and an insulating material which is provided on the heat sink 41 and accommodates the field module 42, each rectifier module 43 and the control board 44. And a case 45. Further, as shown in FIG. 1, the inverter unit 40 is disposed with the heat sink 41 facing the rear bracket 23 in the axial direction. The sensor stator 29 a of the magnetic pole position detection sensor 29 is held at a position surrounding the sensor rotor 29 b while being supported by the heat sink 41.

  As shown in FIGS. 1 and 2, the heat sink 41 includes a plate-shaped heat sink body 41a to which the field module 42 and the rectifier modules 43 are attached, and a plurality of plates protruding from the heat sink body 41a to the rear bracket 23 side. And a heat radiation fin 41b. The plurality of heat radiation fins 41 b are arranged radially in the radial direction of the rotating shaft 15.

  The rectifier module 43 is a combination of a plurality of switching elements for supplying armature current during driving and rectifying armature current during power generation together with peripheral circuits. The field module 42 is a group of a plurality of switching elements for controlling the field current to the field coil 17 together with peripheral circuits. Each structure of the rectifier module 43 and the field module 42 is configured such that a switching element or the like is mounted on a lead frame for wiring and the whole is sealed with a resin material or the like. This prevents a short circuit due to conductive deposits such as water in the rectifier module 43 and the field module 42. The rectifier module 43 has an input / output terminal 43a and a GND terminal (ground terminal) 43b.

  A signal line (not shown) from the sensor stator 29a is connected to the control board 44. Information on the magnetic pole position detected by the magnetic pole position detection sensor 29 is sent from the sensor stator 29a to the control board 44 through a signal line. The control board 44 controls each of the field module 42 and each rectifier module 43 based on the magnetic pole position information from the magnetic pole position detection sensor 29.

  As shown in FIG. 3, the case 45 is provided with a plurality (six in this example) of input / output terminals 46 and a plurality (three in this example) of GND terminals (grounding terminals) 47 that are separated from each other. It has been. Each terminal 46 and 47 is integrated with the case 45 by insert molding in a state where a part is exposed from the case 45.

  One end of the GND terminal 47 is connected to the GND terminal 43b of the rectifier module 43 by welding in a space in the case 45. The other end of the GND terminal 47 is connected to the heat sink body 41 a by a screw member 51 outside the case 45.

  One end of the input / output terminal 46 is connected to the input / output terminal 43a of the rectifier module 43 by welding in a space in the case 45. The other end of the input / output terminal 46 is electrically connected to a lead wire 21a from the stator coil 21 via a connecting board (relay body) 70 shown in FIGS. 1 and 2 attached to the rear bracket 23. Yes. As shown in FIG. 1, the connecting board 70 is disposed between the rear bracket 23 and the heat sink body 41a.

  FIG. 4 is a front view showing a state when the rear bracket 23 to which the connecting board 70 of FIG. 1 is attached is viewed from the inverter unit 40 side. The connecting board 70 is provided on the support insulating portion 71 attached to the rear bracket 23 and the support insulating portion 71, and a plurality of (six in this example) for electrically connecting the lead wire 21a and the rectifier module 43. ) Relay terminal 72. Each relay terminal 72 is integrated with the support insulating portion 71 by insert molding in a state where a part is exposed from the support insulating portion 71.

  When the rear bracket 23 is viewed along the axial direction, the positions of the six lead wires 21a from the respective stator coils 21 are aligned with each other in the circumferential direction of the rear bracket 23. The shape of the support insulating portion 71 when viewing the rear bracket 23 along the axial direction is a shape along the circumferential direction of the rear bracket 23 so as to overlap each position of the six lead wires 21a.

  Each relay terminal 72 has a first end 72 a connected to the lead wire 21 a and a second end 72 b connected to the other end of the input / output terminal 46 shown in FIG. 3. The position of each first end 72a is set according to the position of the corresponding leader line 21a. The position of each second end 72 b is set in accordance with the position of the other end of the corresponding input / output terminal 46. In this example, only the first end portion 72 a and the second end portion 72 b of the relay terminal 72 are exposed from the support insulating portion 71, and the other portions are buried in the support insulating portion 71.

  FIG. 5 is a cross-sectional view taken along line VV in FIG. As shown in FIG. 5, the connecting board 70 is fixed to the rear bracket 23 with a screw member 52. In this example, the connecting board 70 is attached to the rear bracket 23 by fixing a washer integrated with the support insulating portion 71 by insert molding to the rear bracket 23 with a screw member 52. Alternatively, the connecting board 70 may be attached to the rear bracket 23 by press-fitting a part of the support insulating portion 71 into the opening of the rear bracket 23.

  6 is a cross-sectional view taken along line VI-VI in FIG. As shown in FIG. 6, a part of the support insulating portion 71 is fitted into an opening through which the lead wire 21 a is passed, among the openings of the rear bracket 23. A guide path (leader wire through hole) 73 through which the lead wire 21 a passes is provided in a portion of the support insulating portion 71 fitted to the rear bracket 23. Thereby, the insulating state of the lead wire 21 a with respect to the rear bracket 23 is ensured by the support insulating portion 71. The shape of the guide path 73 is a tapered shape that continuously spreads from the inverter unit 40 side toward the stator 12.

  The first end 72a of the relay terminal 72 is disposed along the axial direction. Further, the first end portion 72a is connected to the end portion of the lead wire 21a that has reached the outside of the housing 13 through the guide path 73 by welding.

  7 is a cross-sectional view taken along line VII-VII in FIG. As shown in FIG. 7, the second end 72 b of the relay terminal 72 is arranged at a position farther from the rear bracket 23 than the first end 72 a in the axial direction by bending the relay terminal 72. The second end 72b is disposed perpendicular to the axial direction. The second end 72b is connected to the other end of the input / output terminal 46 shown in FIG. 3 outside the case 45 by fasteners (bolts 53 and nuts 54). That is, the relay terminal 72 is connected to the inverter unit 40 by the fasteners 53 and 54. Thereby, the input / output terminal 43a of the rectifier module 43 and the lead wire 21a are electrically connected to each other via the input / output terminal 46 provided in the case 45 and the relay terminal 72 of the connecting board 70.

  Next, a method for manufacturing the rotating electrical machine 1 will be described. FIG. 8 is a cross-sectional view showing a method of assembling the stator and the rear bracket of FIG. When manufacturing the rotating electrical machine 1, after attaching the connecting board 70 to the rear bracket 23, the stator 12 is assembled to the rear bracket 23 while passing the lead wire 21 a through the guide path 73 of the connecting board 70.

  Thereafter, the rotor 11 and the front bracket 22 and the like are assembled to the rear bracket 23 to produce the rotating electrical machine main body 10, and the inverter unit 40 is attached to the rear bracket 23 to be welded and electrically connected by the screw members 51, 53 and 54. By doing so, the rotating electrical machine 1 is manufactured.

  In such a rotating electrical machine 1, the connecting board 70 is provided between the heat sink body 41 a of the inverter unit 40 and the rear bracket 23, and the lead wire 21 a and the rectifier module 43 are electrically connected via the relay terminal 72 of the connecting board 70. Therefore, the distance between the heat sink body 41a and the rear bracket 23 can be increased while preventing the length of the lead wire 21a from becoming longer than necessary. Thereby, the load concerning the leader line 21a by vibration etc. can be made small, and it can be made hard to make the leader line 21a disconnect. Further, a space for disposing the heat radiation fins 41b of the heat sink 41 can be secured in the space between the heat sink body 41a and the rear bracket 23, and the cooling performance of the field module 42 and the rectifier module 43 by the heat sink 41 is improved. be able to. Furthermore, the rectifier module 43 can be disposed at a position that is easily accessible from the outside, and the rectifier module 43 can be easily replaced due to a failure or the like.

  Further, the input / output terminal 46 provided in the case 45 is connected to the relay terminal 72 of the connecting board 70 by fasteners 53 and 54, and the GND terminal 47 provided in the case 45 is connected to the heat sink body 41a by the screw member 51. Therefore, the inverter unit 40 can be easily removed from the rotating electrical machine main body 10, and the replacement of the inverter unit 40 due to a failure or the like can be further facilitated.

  Furthermore, since the lead wire 21a is led out of the housing 13 through a guide path 73 provided in the support insulating portion 71 and does not directly touch the rear bracket 23, the lead wire 21a and the rear bracket 23 are not touched. A short circuit can be prevented.

  In addition, since the shape of the guide path 73 is a tapered shape that continuously increases from the inverter unit 40 side toward the stator 12, the lead wire 21 a can be easily inserted into the guide path 73 from the stator 12 side. Therefore, the assembly work of the stator 12 to the rear bracket 23 can be easily performed. Thereby, the productivity of the rotating electrical machine 1 can be improved.

Embodiment 2. FIG.
In the first embodiment, the first end portion 72a and the lead wire 21a are joined by welding, but the first end portion 72a and the lead wire 21a may be fixed by a screw member.

  FIG. 9 is a front view showing a state when the rear bracket 23 to which the connecting board 70 of the rotary electric machine 1 according to Embodiment 2 of the present invention is attached is viewed from the inverter unit 40 side. FIG. 10 is a cross-sectional view taken along line XX of FIG.

  In the drawing, the end portion of the lead wire 21a is a lead wire terminal 211a for connection to the first end portion 72a. The lead wire terminal 211a is connected to the conducting wire from the stator coil 21 by welding. The lead wire 21a includes a lead wire from the stator coil 21 and a lead wire terminal 211a.

  The lead wire terminal 211a protrudes out of the housing 13 through the guide path 73, and is connected to the first end 72a by a fastener (bolt 80 and nut 81). Other configurations are the same as those in the first embodiment.

  Even if it is such a structure, the effect similar to Embodiment 1 can be acquired. Further, since the lead wire terminal 211a and the first end portion 72a are fixed by the bolt 80 and the nut 81, assembly and disassembly can be performed more easily than in the first embodiment.

Embodiment 3 FIG.
In the first embodiment, the other end of the input / output terminal 46 and the second end 72b are fixed by the fasteners 53 and 54. However, the other end of the input / output terminal 46 and the second end 72b are fixed. You may connect by welding.

  FIG. 11 is a front view showing a state when the rear bracket 23 to which the connecting board 70 of the rotating electrical machine 1 according to Embodiment 3 of the present invention is attached is viewed from the inverter unit 40 side. FIG. 12 is a front view showing the inverter unit 40 of FIG. 13 is a front view showing a state where the inverter unit 40 of FIG. 12 is attached to the rear bracket 23 of FIG. FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG.

  As shown in the drawing, the second end portion 72b protrudes from the support insulating portion 71 in the direction away from the rear bracket 23 along the axial direction. As shown in FIG. 14, the other end of the input / output terminal 46 is disposed along the axial direction by bending the input / output terminal 46. The other end of the input / output terminal 46 and the second end 72b are connected outside the case 45 by welding. That is, the inverter unit 40 and the relay terminal 72 are connected by welding. Other configurations are the same as those in the first embodiment.

  According to such a configuration, the amount of fasteners 53 and 54 to be used is reduced as compared with the first embodiment, so that the cost can be reduced. Further, since the input / output terminal 46 and the second end portion 72b are connected by welding, the productivity of the rotating electrical machine 1 can be improved.

Embodiment 4 FIG.
FIGS. 15-17 is a front view which shows the state when the rear bracket 23 with which the connecting board 70 of the rotary electric machine by Embodiment 4 of this invention was attached was seen from the inverter unit 40 side.

  15 and 16 are compared, the distance from the axis of the rotary shaft 15 to each lead wire 21a is different between the rotary electric machine 1 of FIG. 15 and the rotary electric machine 1 of FIG. Specifically, the outer diameter of the rotating electrical machine main body 10 in FIG. 15 is larger than the outer diameter of the rotating electrical machine main body 10 in FIG. 16, and the distance (RA from the axis of the rotating shaft 15 in FIG. 15 to the position of each lead wire 21a. ) Is longer than the distance (RB) from the axis of the rotary shaft 15 to the lead lines 21a in FIG.

  On the other hand, when the rotating electrical machines 1 of FIGS. 15 and 17 are compared, the positions of the lead wires 21a in the circumferential direction are different between the rotating electrical machine 1 of FIG. 15 and the rotating electrical machine 1 of FIG. Specifically, the positions of the three lead lines 21a of the U, V, and W phases in FIG. 15 are equally spaced in the circumferential direction, whereas the three lines of the U, V, and W phases in FIG. The leader lines 21a are unequally spaced in the circumferential direction.

  15-17, the position of the 1st end part 72a of the relay terminal 72 is set according to the position of each leader line 21a. Therefore, the distance from the axis of the rotating shaft 15 in FIG. 15 to the first end 72a is longer than the distance from the axis of the rotating shaft 15 in FIG. 16 to the first end 72a. Further, the positions of the three first end portions 72a corresponding to the U, V, and W phases in FIG. 15 are equally spaced in the circumferential direction, whereas they correspond to the U, V, and W phases in FIG. The positions of the three first end portions 72a are unequal in the circumferential direction.

  On the other hand, the position of the second end 72b of the relay terminal 72 with respect to the rotating shaft 15 is the same in all of the connecting boards 70 in FIGS. Further, an inverter unit 40 of the same size is attached to each rear bracket 23 in FIGS. 15 to 17. Accordingly, the positions of the terminals 46 and 47 are the same between FIGS.

  In the present embodiment, from the connecting board set including a plurality of connecting boards 70 that differ only in the position of the first end 72a of the relay terminal 72, it corresponds to the position of each leader line 21a in FIGS. Each of the connecting boards 70 shown in FIGS. 15 to 17 is determined by selecting the connecting board 70 (the position of the first end portion 72a coincides with the position of each lead line 21a). The configuration of the rotating electrical machine 1 in FIGS. 15 to 17 is the same as that in the first embodiment.

  In such a rotating electrical machine 1, by attaching different connecting boards 70 corresponding to the rotating electrical machine main bodies 10 in which the positions of the lead wires 21a are different from each other to the rear bracket 23, the positions of the lead wires 21a are different from each other. A common type of inverter unit 40 can be applied to 10. Thereby, it is not necessary to manufacture a plurality of types of expensive inverter units 40 according to the rotating electrical machine main body 10, and the inverter units 40 can be shared. That is, by preparing a variation of the inexpensive connecting board 70 in accordance with the position of each lead line 21a, the expensive inverter unit 40 can be shared. Thereby, cost reduction can be aimed at.

Embodiment 5 FIG.
FIG. 18 is a front view showing a state when the rear bracket 23 to which the connecting board 70 of the rotating electrical machine 1 according to the fifth embodiment is attached is viewed from the inverter unit 40 side. As shown in FIG. 18, at least some of the radiating fins 41 b are disposed between the connecting board 70 and the rotating shaft 15 when the rotating electrical machine 1 is viewed along the axial direction. Thereby, when the rotary electric machine 1 is seen along the axial direction, each position of the connection part (six lead line connection part) of the 1st end part 72a of the relay terminal 72 and the leader line 21a is the radiation fin 41b. It is a position on the outside in the radial direction. Of the six lead wire connecting portions, the three lead wire connecting portions are the other end portion and the second end portion 72b of the input / output terminal 46 of the inverter unit 40 when the rotary electric machine 1 is viewed along the axial direction. Are disposed in a region where the boss 30 is projected inward in the radial direction. Other configurations are the same as those in the first embodiment.

  In such a rotating electrical machine 1, since the lead wire connecting portion is disposed in the region where the inverter connecting portion or the boss 30 is projected radially inward, the radial direction is formed in the space between the rear bracket 23 and the heat sink body 41a. It is possible to make it difficult for the cooling air entering along the line to interfere with the lead wire connecting portion. Thereby, the heat dissipation effect in the radiation fin 41b can be improved, and the cooling performance by the heat sink 41 can be further improved.

  In addition, in the said embodiment, although three leader line connection parts are arrange | positioned in the area | region which projected the inverter connection part or the boss | hub 30 to radial inside among six leader line connection parts, an inverter connection part Alternatively, if at least one lead wire connecting portion is disposed in a region where the boss 30 is projected radially inward, the cooling air can easily enter the space between the rear bracket 23 and the heat sink body 41a. The cooling performance can be improved.

  Further, in each of the above embodiments, the connecting board 70 is attached to the rear bracket 23 before the stator 12 is assembled to the rear bracket 23. However, after the stator 12 and the rear bracket 23 are assembled, the rear bracket 23 A connecting board 70 may be attached.

  DESCRIPTION OF SYMBOLS 1 Rotating electrical machine 10 Rotating electrical machine main body 11 Rotator 12 Stator 13 Housing 21 Stator coil (stator winding) 21a Lead wire 22 Front bracket 23 Rear bracket 30 Boss 40 Inverter unit 41 Heat sink, 41a Heat sink body, 41b Radiation fin, 43 Rectifier module, 53 bolt, 54 nut, 71 Support insulation, 72 Relay terminal, 73 Induction path, 80 bolt, 81 nut

Claims (8)

A rotor rotated about an axis, an annular stator arranged coaxially with the rotor and having a stator winding, a front bracket and a rear bracket, and supporting the rotor and the stator An inverter having a rotating electrical machine body having a housing and a rectifier module including a plurality of switching elements, and a heat sink to which the rectifier module is attached, the axial direction of the heat sink being opposed to the rear bracket With a unit
The heat sink has a heat sink body to which the rectifier module is attached, and a heat radiation fin protruding from the heat sink body to the rear bracket side,
Between the rear bracket and the heat sink body, a relay body having a support insulating part attached to the rear bracket and a relay terminal provided in the support insulating part is provided,
The heat dissipating fins are disposed between the relay body and the axis so as to avoid the relay body when viewed along the axis.
A rotating electrical machine in which a lead wire drawn from the stator winding and the rectifier module are electrically connected via the relay terminal.   The rotating electrical machine according to claim 1, wherein the support insulating portion is provided with a guide path through which the lead wire passes.   The rotating electrical machine according to claim 1, wherein the lead wire and the relay terminal are connected by welding.   The rotating electrical machine according to claim 1 or 2, wherein the lead wire and the relay terminal are connected by a fastener.   The rotating electrical machine according to any one of claims 1 to 4, wherein the inverter unit and the relay terminal are connected by welding.   The rotating electrical machine according to any one of claims 1 to 4, wherein the inverter unit and the relay terminal are connected by a fastener.   The rotating electrical machine according to any one of claims 1 to 6, wherein the relay body uses a relay terminal having a position different depending on a position connected to the lead wire.   At least one of the connecting portions between the lead wire and the relay terminal is a region where a connecting portion between the relay terminal and the inverter unit or a boss that attaches the inverter unit to the rear bracket is projected radially inward. The rotary electric machine as described in any one of Claims 1-7 arrange | positioned in the inside.

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